Wireless disconnecting

In the past few months I've experienced a problem whilst using the internet on my Macbook whereby my wireless connection will drop, despite my wireless signal being full and Airport being shown as on. I don't get any messages or anything, my browser just shows pages as "loading" until I either reset my computer or turn Airport off and on again. This happens every few hours, seemingly without any regularity.

Can anyone help me fix this? It's become extremely annoying.

Does the airport light stay green?
Are you able to see if it happens with another laptop or device?
What mode is your airport in - i.e DHCP nat or bridge?

G'day and welcome to the forums.

And have you set it up with WPA2 Personal security?

Yes, I have WPA2 Personal as my security, and DHCP with a manual address.